| /******************************************************************************* |
| * Copyright (c) 2000, 2019 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.internal.gtk3.*; |
| import org.eclipse.swt.internal.gtk4.*; |
| |
| /** |
| * Instances of this class allow the user to select a color |
| * from a predefined set of available colors. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>(none)</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ColorDialog extends Dialog { |
| RGB rgb; |
| RGB [] rgbs; |
| /** |
| * Constructs a new instance of this class given only its parent. |
| * |
| * @param parent a composite control which will be the parent of the new instance |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ColorDialog (Shell parent) { |
| this (parent, SWT.APPLICATION_MODAL); |
| } |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ColorDialog (Shell parent, int style) { |
| super (parent, checkStyle (parent, style)); |
| checkSubclass (); |
| } |
| |
| /** |
| * Returns the currently selected color in the receiver. |
| * |
| * @return the RGB value for the selected color, may be null |
| * |
| * @see PaletteData#getRGBs |
| */ |
| public RGB getRGB () { |
| return rgb; |
| } |
| /** |
| * Returns an array of <code>RGB</code>s which are the list of |
| * custom colors selected by the user in the receiver, or null |
| * if no custom colors were selected. |
| * |
| * @return the array of RGBs, which may be null |
| * |
| * @since 3.8 |
| */ |
| public RGB[] getRGBs() { |
| return rgbs; |
| } |
| /** |
| * Makes the receiver visible and brings it to the front |
| * of the display. |
| * |
| * @return the selected color, or null if the dialog was |
| * cancelled, no color was selected, or an error |
| * occurred |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public RGB open () { |
| byte[] buffer = Converter.javaStringToCString(title); |
| long handle = GTK.gtk_color_chooser_dialog_new(buffer, parent.topHandle()); |
| Display display = parent != null ? parent.getDisplay(): Display.getCurrent(); |
| |
| GdkRGBA rgba = new GdkRGBA(); |
| if (rgb != null) { |
| rgba.red = (double) rgb.red / 255; |
| rgba.green = (double) rgb.green / 255; |
| rgba.blue = (double) rgb.blue / 255; |
| rgba.alpha = 1; |
| } |
| GTK.gtk_color_chooser_set_rgba (handle, rgba); |
| if (rgbs != null) { |
| int colorsPerRow = 9; |
| long gdkRGBAS = OS.g_malloc(GdkRGBA.sizeof * rgbs.length); |
| rgba = new GdkRGBA (); |
| for (int i=0; i<rgbs.length; i++) { |
| RGB rgbS = rgbs[i]; |
| if (rgbS != null) { |
| rgba.red = (double) rgbS.red / 255; |
| rgba.green = (double) rgbS.green / 255; |
| rgba.blue = (double) rgbS.blue / 255; |
| OS.memmove (gdkRGBAS + i * GdkRGBA.sizeof, rgba, GdkRGBA.sizeof); |
| } |
| } |
| GTK.gtk_color_chooser_add_palette(handle, GTK.GTK_ORIENTATION_HORIZONTAL, colorsPerRow, |
| rgbs.length, gdkRGBAS); |
| GTK.gtk_color_chooser_set_rgba (handle, rgba); |
| |
| |
| if (GTK.gtk_color_chooser_get_use_alpha(handle)) { |
| GTK.gtk_color_chooser_set_use_alpha (handle, false); |
| } |
| OS.g_free (gdkRGBAS); |
| } |
| |
| display.addIdleProc(); |
| Dialog oldModal = null; |
| if (GTK.gtk_window_get_modal(handle)) { |
| oldModal = display.getModalDialog(); |
| display.setModalDialog(this); |
| } |
| int signalId = 0; |
| long hookId = 0; |
| if ((style & SWT.RIGHT_TO_LEFT) != 0) { |
| signalId = OS.g_signal_lookup (OS.map, GTK.GTK_TYPE_WIDGET()); |
| hookId = OS.g_signal_add_emission_hook (signalId, 0, display.emissionProc, handle, 0); |
| } |
| |
| int response; |
| if (GTK.GTK4) { |
| response = SyncDialogUtil.run(display, handle, false); |
| } else { |
| display.externalEventLoop = true; |
| display.sendPreExternalEventDispatchEvent(); |
| response = GTK3.gtk_dialog_run(handle); |
| display.externalEventLoop = false; |
| display.sendPostExternalEventDispatchEvent(); |
| } |
| |
| if ((style & SWT.RIGHT_TO_LEFT) != 0) { |
| OS.g_signal_remove_emission_hook(signalId, hookId); |
| } |
| if (GTK.gtk_window_get_modal (handle)) { |
| display.setModalDialog(oldModal); |
| } |
| boolean success = response == GTK.GTK_RESPONSE_OK; |
| if (success) { |
| int red = 0; |
| int green = 0; |
| int blue = 0; |
| rgba = new GdkRGBA(); |
| GTK.gtk_color_chooser_get_rgba(handle, rgba); |
| red = (int) (rgba.red * 255); |
| green = (int) (rgba.green * 255); |
| blue = (int) (rgba.blue * 255); |
| rgb = new RGB(red, green, blue); |
| } else { |
| rgb = null; |
| } |
| |
| display.removeIdleProc(); |
| if (GTK.GTK4) { |
| GTK4.gtk_window_destroy(handle); |
| } else { |
| GTK.gtk_widget_destroy(handle); |
| } |
| |
| return rgb; |
| } |
| /** |
| * Sets the receiver's selected color to be the argument. |
| * |
| * @param rgb the new RGB value for the selected color, may be |
| * null to let the platform select a default when |
| * open() is called |
| * @see PaletteData#getRGBs |
| */ |
| public void setRGB (RGB rgb) { |
| this.rgb = rgb; |
| } |
| /** |
| * Sets the receiver's list of custom colors to be the given array |
| * of <code>RGB</code>s, which may be null to let the platform select |
| * a default when open() is called. |
| * |
| * @param rgbs the array of RGBs, which may be null |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if an RGB in the rgbs array is null</li> |
| * </ul> |
| * |
| * @since 3.8 |
| */ |
| public void setRGBs(RGB[] rgbs) { |
| this.rgbs = rgbs; |
| } |
| static String[] splitString(String text, char ch) { |
| String[] substrings = new String[1]; |
| int start = 0, pos = 0; |
| while (pos != -1) { |
| pos = text.indexOf(ch, start); |
| if (pos == -1) { |
| substrings[substrings.length - 1] = text.substring(start); |
| } else { |
| substrings[substrings.length - 1] = text.substring(start, pos); |
| start = pos + 1; |
| String[] newSubstrings = new String[substrings.length+1]; |
| System.arraycopy(substrings, 0, newSubstrings, 0, substrings.length); |
| substrings = newSubstrings; |
| } |
| } |
| return substrings; |
| } |
| } |
| |